Has anyone installed Spintech mufflers on their truck? If so was there any drone zone with them? They are a baffle design vs flow thru like Edelbrock RPM series that drone between 14 and 1,700 RPM's, 20 to 40 mph drone zone.

Carl....=o&o>....

 

i do have a set on my bronco , but i think it depends on the motor and the length of the system. i have the center in and out 2.5. i had them on my stock 79 with headers and 10 feet of 2.5 tubing straight out the back,it was the 400m really coulndnt hear the sytem nice and quiet. sold the truck and keep the mufflers, now there on my bronco 80 351w cam,headers rpm manifold 4 bbl ,the works. i have the headers 1 foot of tubing the muffler and 1 foot more and a 45 down to the ground and now its deafaning and drons really bad . i think the length and were it exits makes a difference big time.

 

Botz244, the system on the 68 CS (410) is headers, X cross over, mufflers just before the rear axle all in 2 1/2". 2 1/2" to 3" cone, over the axle, cone 3" to 4 1/2" then 19" tips at 4 1/2" diameter out the rear under the bumper. The flow thru design mufflers will drone even out the rear, baffle design will drone if you turn down under the vehicle. What series did you buy? I just got the Spintech Truck RV mufflers (8332 & 8333) 2 1/2". They are the most quiet series, 20 1/4" long X 10 1/2" wide with two rows of 5 coils inside. If I remove the baffles I made for the tips to "tone it down", car alarms and cops go off.

Carl....=o&o>....

 

ill have to check on that ill look at the site and get back with you on that one. i take it its a truck and onl 2wd?. do you have a manual or auto with a stall. id like the see your system under my bronco with the 4wd

 

Botz244, if you go to "exhaust systems" on page 31 under 'tip length", a few photos posted on the exhaust system I made for the 68 CS.

Carl....=o&o>....

 

So, I know I'm reviving a pretty old thread here, but I think that's what the search function is for.

Anyway, does that mean that the Spintech mufflers are very sensitive to system length, or just tip length? For me, I'm mostly just interested in a quiet exhaust.
Can we start this thread up again? Has anyone but these two tried them?

 

bump, i think beemer nut ended up trying spintechs....maybe he will reply

 

Spintech's sound (my opinion) and flow better ( lab flow tests) and built better than FlowMasters as they can fail. The Spin Truck RV is their quiet muffler, list is $134 each, I paid $105 cash and carry. I have a 14-1,700 rpm drone zone that I have caused (4 1/2" tips but have that right look) due to size increase from 2 1/2" to 3" cone after the mufflers just before the rear axle, then a 14" long cone to 4 1/2" then 4 1/2" tips out the back. This even drones with 18" X 3" female end louvered glass packs stuffed into the tips. I just purchased a set of Vibrant's stainless steel resonators #1141, they have a perforated liner that i'll install before the mufflers. Body is 9 1/4' long x 4 1/2" x 6" oval.
As far as Edelbrock RPM's I had first the drome was so bad that your eardrums chattered and hurt, car alarms went off. Don't want to **** off good neighbors.
I haven't a clue to what Edelebrock's new STD / SDT (?) (you don't want to get a STD) sounds like or the drone factor, I know the Hooker Aero Chambers are quiet.

Sorry I ran off with the fingers again, as far as pipe length after the muffler your not going to change the sound that much, a loud muffler will be loud period.
The more bends will lower the sound but then to reduce it a lot you would need 30' then it's a package and back pressure issue.
Going too large of pipe will make more noise, cost more and reduce your low end torque. Louvered glass packs seen to choke up the more exhaust volume you force thru them, perforated glass packs if you must have them.
Same muffler on a different motors sound totally different to a point that "wow" on a chebbie sounds muddy on a Ford.
It makes me sick to see a bunch of crushed bends and crappy welds 90% of muffler shop do to customers cars like jam a pipe that has burned ends into a muffler that creates a turbulence and restriction. Motor runs so customer is happy.

.....=o&o>.....

 

botz244;

I located the photos Spudly posted last year on the home brew exhaust system I built (34 pieces of pipe). It shows Edelbrock RPM's but now run Spintech's. Spins were 1 1/4" longer so a easy cut and install. Stainless band clamps make life easy for starter and trans removal or altering the exhaust.

http://home.comcast.net/~spudly55/EX1.jpg

http://home.comcast.net/~spudly55/EX2.jpg

http://home.comcast.net/~spudly55/EX3.jpg

http://home.comcast.net/~spudly55/EX4.jpg

.....=o&o>.....